Caution urged for travellers to Thailand

Australians travelling to Bangkok are being warned to exercise caution following a bomb blast which killed at least 20 people and left 123 wounded.

Eight tourists from China, Hong Kong, Indonesia, Malaysia and Singapore were among those killed in Monday's attack.

Thai police on Tuesday reported a second explosion in Bangkok, with no injuries, a day after the deadly bombing outside the popular Erawan shrine in the heart of Bangkok's tourist and commercial centre.

Prime Minister Tony Abbott told parliament on Tuesday the "vicious attack" was clearly aimed at innocent people, but no Australians were known to have been harmed.

"Australians should continue to go to Thailand because the objective of the sorts of people who let off bombs in crowded cities is to scare us from being ourselves and we should never be intimidated by that," he said.

But Mr Abbott said anyone travelling to the country should exercise caution.

Qantas will help Australians who want to get out of Bangkok after the deadly bomb blast.